Sen. Joe Lieberman, I-Conn. smiles during a news conference on Capitol Hill in Washington, Tuesday, Jan. 31, 2012. Lieberman is retiring from the Senate at the end of the current session. (AP Photo/Jacquelyn Martin)
Photo: Jacquelyn Martin, Associated Press

Sen. Joe Lieberman, I-Conn. smiles during a news conference on...

Sen. Joseph Lieberman, I-Conn., speaks during a news conference at the state capitol in Hartford, Conn., Monday, Dec. 10, 2012. Lieberman is kicking off a farewell tour with words of thanks for the people of Connecticut and warnings about dysfunction in Washington. Lieberman is retiring at the end of the session on Jan. 3 after 24 years in the Senate. (AP Photo/Jessica Hill)
Photo: Jessica Hill, Associated Press